I miss the sideburns he had in Chitty, the jet black hair from Cabaret, and the ahem whole package in the sack of lemons costume.
And I loved Chitty! The sad thing is, out of all his shows, I believe I saw that one the most.
As for non costumes, I think my favorite would be the suit he recently wore to the Kander and Ebb concert. It had suspenders! :)
"What a mystery this world. One day you love them and the next day you want to kill them a thousand times over." The Masked Bandit in THE FALL